Title :
Continuous phase-shift quantum key distribution
Author :
Sych, Denis ; Leuchs, Gerd
Author_Institution :
Max Planck Inst. for the Sci. of Light, Erlangen, Germany
Abstract :
In this paper we continue the idea of improving QKD by varying a quantum alphabet. We introduce a protocol for continuous variable QKD, where information is encoded in continuously modulated phase of coherent states of light (continuous phase-shift keying). The corresponding quantum alphabet is a circle in phase space, thus the proposed protocol is in a certain sense in between binary modulation and Gaussian modulation.
Keywords :
phase shift keying; protocols; quantum cryptography; Gaussian modulation; binary modulation; coherent states; continuous phase-shift keying; continuous phase-shift quantum key distribution; continuous variable QKD; quantum alphabet; Continuous phase modulation; Cryptographic protocols; Cryptography; Error correction; Optical modulation; Optical receivers; Optical sensors; Phase modulation; Phase shift keying; Photonics;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5196231
